CN108899352B - Display panel, manufacturing method thereof and display device - Google Patents
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- CN108899352B CN108899352B CN201810805652.0A CN201810805652A CN108899352B CN 108899352 B CN108899352 B CN 108899352B CN 201810805652 A CN201810805652 A CN 201810805652A CN 108899352 B CN108899352 B CN 108899352B
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- 238000004519 manufacturing process Methods 0.000 title claims description 30
- 230000000903 blocking effect Effects 0.000 claims abstract description 126
- 239000000758 substrate Substances 0.000 claims abstract description 47
- 230000002093 peripheral effect Effects 0.000 claims abstract description 17
- 238000005538 encapsulation Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 3
- 229920002120 photoresistant polymer Polymers 0.000 claims description 2
- 238000004806 packaging method and process Methods 0.000 abstract description 25
- 229910052760 oxygen Inorganic materials 0.000 abstract description 21
- 239000001301 oxygen Substances 0.000 abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 15
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- 239000012044 organic layer Substances 0.000 description 9
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- 239000011248 coating agent Substances 0.000 description 6
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/094—Multilayer resist systems, e.g. planarising layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/805—Electrodes
- H10K59/8052—Cathodes
- H10K59/80522—Cathodes combined with auxiliary electrodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/873—Encapsulations
- H10K59/8731—Encapsulations multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
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- Microelectronics & Electronic Packaging (AREA)
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Abstract
The present invention provides a display panel, comprising: a substrate; a plurality of light emitting structures arranged in an array, the light emitting structures being disposed on the substrate; a blocking structure located at least in a peripheral region of the substrate; and a cathode layer on the light emitting structure and the blocking structure. The blocking structure causes the cathode layer to break at a location corresponding to the blocking structure. Due to the fact that the blocking structure is arranged in the display panel and at least located in the peripheral area of the substrate, the cathode layer can be disconnected at the position corresponding to the blocking structure, the damage path of water and oxygen corrosion in the prior art is blocked, and the overall packaging performance of the display panel is improved under the condition that the elasticity of the display panel and the packaging space of each light-emitting structure are not damaged.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a manufacturing method of the display panel and a display device.
Background
With the development of the information-oriented society, demands for display devices for displaying images have increased. Recently, various types of flat panel display devices, such as liquid crystal displays, plasma display devices, organic light emitting displays, and electrophoretic displays, have been developed. In recent years, research has been continuously conducted to implement a flat panel display device such as an organic light emitting display or an electrophoretic display in the form of a flexible display having flexibility.
In the initial display panel design, the circuit board is typically disposed on a rigid substrate to form a rigid panel. With the advancement of technology, those skilled in the art have developed flexible panels with bendable elements on the basis of rigid panels. In practice, flexible panels present a limitation, and therefore, those skilled in the art have developed coplanar stretchable panels and non-coplanar stretchable panels.
However, the applicant has found that due to the limitations of the packaging process and the shape of the light emitting structure provided in the stretchable display panel, the side packaging of the light emitting structure is not easy to achieve an effective water and oxygen blocking effect. In addition, independently encapsulating each light-emitting structure can directly increase the encapsulation space, cannot meet the design requirement of a narrow frame, also can increase the difficulty of the encapsulation process and improve the manufacturing cost.
Disclosure of Invention
In view of this, the present invention provides a display panel, a manufacturing method thereof, and a display device, so as to solve a plurality of problems in the prior art that an effective water and oxygen blocking effect is not easily achieved in packaging due to a slope problem of a light emitting structure, a packaging space is large, and a design requirement of a narrow frame cannot be met.
In view of the above problem, in a first aspect, an embodiment of the present application discloses a display panel, including:
a substrate;
a plurality of light emitting structures arranged in an array, the light emitting structures being disposed on the substrate;
a blocking structure located at least in a peripheral region of the substrate;
a cathode layer on the light emitting structure and the blocking structure;
the blocking structure causes the cathode layer to break at a location corresponding to the blocking structure.
In a second aspect, an embodiment of the present application further discloses a display device, including: the display panel of the first aspect.
In a third aspect, an embodiment of the present application further discloses a manufacturing method of the display panel of the first aspect, including:
manufacturing a plurality of light-emitting structures arranged in an array on the substrate;
manufacturing a blocking structure on the light emitting structure, wherein the blocking structure is at least positioned in the peripheral area of the substrate;
manufacturing a cathode layer on the blocking structure; wherein: the blocking structure causes the cathode layer to break at a location corresponding to the blocking structure.
The beneficial effects obtained by applying the embodiment of the invention comprise:
owing to set up in the display panel of this application embodiment and blocked the structure, should block the structure and be located at least the peripheral region of substrate, can break off the position department that the cathode layer should block the structure and correspond, compare with prior art, the destruction route that the water oxygen that appears among the prior art corrodes can be blocked in the setting of blocking the structure, display panel's the oxygen performance that blocks water has been increased, and can be under the circumstances of the elasticity of not destroying display panel and every light-emitting structure's packaging space, display panel's whole encapsulation performance has been promoted, and the encapsulation structure of high analytic pixel level can be accomplished, and then the design requirement of narrow frame can be satisfied.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a top view of a display panel without a blocking structure;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a top view of a blocking structure provided in an embodiment of the present application;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;
FIG. 5 is a cross-sectional view taken along line C-C of FIG. 3;
FIG. 6 is a cross-sectional view taken along line D-D of FIG. 3;
fig. 7(a) is a cross-sectional view of a first connection mode of a blocking structure according to an embodiment of the present application;
fig. 7(b) is a sectional view of a second coupling means of the blocking structure according to the embodiment of the present application;
FIG. 8 is a simplified top view of a light-emitting structure of a display panel and a plurality of openings;
FIG. 9 is a cross-sectional view taken along line F-F of FIG. 8;
FIG. 10 is a cross-sectional view taken along line G-G of FIG. 8;
fig. 11 is a top view of a blocking structure disposed around the light emitting structure in fig. 8;
fig. 12 is a cross-sectional view of the display panel of the first embodiment, cut along line E-E of fig. 11;
FIG. 13 is a cross-sectional view of the display panel of the second embodiment, taken along line E-E of FIG. 11;
FIG. 14 is a top view of the display panel of FIG. 8 coated with an organic layer;
fig. 15 is a cross-sectional view of a display panel in which an organic layer is confined based on a blocking structure according to an embodiment of the present application;
fig. 16 is a flowchart of a method of manufacturing a display panel according to an embodiment of the present application.
The reference numerals are introduced as follows:
p1-first path of water vapor attack;
1-a substrate; 2-a light emitting structure; 3-a pixel defining layer; 4-a cathode layer; 5-a first inorganic layer, 10-a first organic layer; 11-a second inorganic layer; 12-a blocking structure; 13-opening the hole;
c a cathode blocking region; d-a cathodic non-blocking region; e-size of the light emitting layer islands; f-the width of the connecting bridge.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, "connected" as used herein may include wirelessly connected. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The applicant has found that in order to be able to provide a structure in which the display panel is not damaged when stretched, a new type of encapsulation structure is required that separates each pixel structure. Generally, since the top of the light emitting structure cannot achieve an effective encapsulation effect, moisture can corrode from the top of the light emitting structure to the inside of the island of the stretchable display panel, thereby oxidizing the light emitting layer. In addition, the substrate and the encapsulation layer cannot achieve an effective encapsulation effect due to the defect caused by the strain borne by the substrate and the encapsulation layer, so that water vapor can corrode the light-emitting layer from the bottom of the light-emitting structure, and the light-emitting layer is further oxidized.
The applicant finds that in the prior art, each light-emitting structure arranged on the substrate needs to be packaged independently, and in the existing packaging process, the light-emitting layer, the thin film transistor, the substrate and other elements need to be packaged completely at the same time, which results in the need of a larger space for packaging, thus increasing the difficulty of the packaging process, and being difficult to achieve a high-resolution pixel-level packaging structure.
The applicant has also found that the water and oxygen blocking performance of the prior art display panel is poor and fig. 1 shows a top view of the prior art display panel, in which the cathode layer and the encapsulation layer arranged on top of the light emitting structure 2 have been removed in fig. 1 for a detailed description of the structure thereof. As shown in fig. 1, two light emitting structures 2 arranged at intervals are provided on a substrate 1, and a pixel defining layer 3 for defining the positions of the light emitting structures 2 is provided around the light emitting structures 2. Between the two light emitting structures 2, an opening 13 is further provided for increasing the overall elasticity of the stretchable panel. Fig. 2 shows a cross-sectional view taken along line a-a in fig. 1, wherein a cathode layer 4 and an encapsulation layer for encapsulating the light emitting structure 2 are included.
As shown in fig. 2, a pixel defining layer 3 is disposed on a substrate 1, and a light emitting structure 2 is disposed in a region surrounded by the pixel defining layer 3, i.e., the pixel defining layer 3 is located in a peripheral region of the light emitting structure 2. A cathode layer 4 is provided on the substrate 1, the light emitting structure 2 and the pixel defining layer 3, and an encapsulation layer is provided on the cathode layer 4, the encapsulation layer covering the substrate 1. The encapsulation layer comprises a plurality of alternating inorganic and organic layers arranged in a stack, of which only the first inorganic layer 5, the first organic layer 10 and the second inorganic layer 11 are shown in fig. 3.
The inventor of the present application has also found that the cathode material itself currently used is sensitive to water and oxygen, which is liable to cause poor conductivity, and the cathode material is a non-dense (non-water-blocking) metal, and the oxidation phenomenon diffuses inward rapidly, so that, due to the continuity of the cathode layer 4, in the structural design of the prior art, moisture can enter the island including the light-emitting structure 2 and the pixel defining layer 3 along the first water and oxygen erosion path P1 in fig. 2, so that the water and oxygen blocking performance of the display panel is poor.
Therefore, in order to solve the technical problem caused by poor packaging effect in the prior art, embodiments of the present application provide a display panel and a manufacturing method thereof. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 3 to 5, an embodiment of the present application discloses a display panel, including: a substrate 1; a plurality of light emitting structures 2 arranged in an array, the light emitting structures 2 being disposed on the substrate 1; a blocking structure 12 located at least in a peripheral region of the substrate 1; a cathode layer 4 on the light emitting structure 2 and the blocking structure 12; wherein: the blocking structures 12 cause the cathode layer 4 to be disconnected at the locations corresponding to the blocking structures 12.
Because the blocking structure is arranged in the display panel of the embodiment of the application, the blocking structure is at least positioned in the peripheral area of the substrate, the cathode layer can be disconnected at the position corresponding to the blocking structure, compared with the prior art, the blocking structure can block the water-oxygen erosion path in the prior art, the water-oxygen blocking performance of the display panel is increased, the overall packaging performance of the display panel can be improved under the condition that the elasticity of the display panel and the packaging space of each light-emitting structure are not damaged, the high-resolution pixel-level packaging structure can be realized, and the design requirement of a narrow frame can be met.
The display panel provided by the embodiment of the application takes a stretchable display panel as an example.
In an embodiment, at least a part of the peripheral region of the light emitting structure 2 is provided with the blocking structure 12, as shown in fig. 4, only one of the light emitting structures 2 is shown in fig. 4, in a specific embodiment, the blocking structure 12 may be provided in all the peripheral regions of the light emitting structure 2, and the specific arrangement of the blocking structure 12 may be set according to actual production needs.
In one embodiment, as shown in fig. 4, the blocking structure 12 may be simultaneously disposed on the pixel defining layers 3 at both sides of the light emitting structure 2; in another embodiment, as shown in fig. 5, the blocking structure 12 may also be disposed on the pixel defining layer 3 only on one side of the light emitting structure 2; further, as shown in fig. 6, the blocking structure 12 can also be provided around the pixel defining layer 3, such as: is provided on the substrate 1.
Preferably, in order to be able to disconnect the cathode layer 4, it is avoided that the continuous cathode layer 4 forms a water-oxygen erosion path, so that the area of the orthographic projection of the upper surface of the blocking structure 12 on the substrate 1 is larger than the area of the orthographic projection of the lower surface of the blocking structure 12 on the substrate 1.
In one embodiment, the cross-sectional shape of the blocking structure 12 is an inverted trapezoid; of course, in actual design, the cross-sectional shape of the blocking structure 12 may be a columnar structure having a mushroom head.
In a specific embodiment, the material of blocking structure 12 comprises photoresist; of course, in the actual production process, the material of the blocking structure 12 may also include other organic materials, which is not limited herein.
In one embodiment, the cathode layer 4 is in contact with the sidewalls of the blocking structure 12, as shown in fig. 7 (a); alternatively, in another embodiment, there is a gap between the cathode layer 4 and the side wall of the blocking structure 12, as shown in fig. 7 (b).
Referring to fig. 7(a), when the sidewall of the blocking structure 12 having the inverted trapezoid structure is steeper, such as 70 degrees or 80 degrees between the sidewall and the horizontal plane, the cathode layer 4 is in contact with the sidewall of the blocking structure 12, and the blocking structure 12 having the steeper sidewall is easier to fabricate in actual production. The provision of the blocking structure 12 enables the cathode layer 4 to be disconnected, even if a separation occurs between the cathode layer 4 outside the blocking structure 12 (e.g., the cathode layer 4 on the right side of the blocking structure 12 in the figure) and the substrate 1 due to poor adhesion, the separation does not extend to the area of the island including the light emitting structure 2 and the pixel defining layer, i.e., the cathode layer 4 inside the blocking structure 12 (e.g., the cathode layer 4 on the left side of the blocking structure 12 in the figure) does not separate from the substrate 1, enhancing the adhesion of the cathode layer 4. Therefore, the blocking structure 12 can block the water and oxygen erosion path and enhance the adhesion of the display panel film layer.
Further, referring to fig. 7(b), when the side wall of the blocking structure 12 of the inverted trapezoid structure is relatively flat, for example, the included angle between the side wall and the horizontal plane is 30 degrees or 40 degrees, there is a gap between the cathode layer 4 and the side wall 12 of the blocking structure, this arrangement is compared with the arrangement shown in fig. 7(a), when the water and oxygen blocking performance of the blocking structure 12 is not very good, because there is a gap between the cathode layer 4 and the side wall 12 of the blocking structure, the water and oxygen erosion path can be further blocked, and the packaging performance is further enhanced.
Specifically, the display panel of the embodiment of the present application further includes a planarization layer and a pixel defining layer; the flat layer is positioned between the substrate 1 and the light-emitting structure 2, and the pixel defining layer 3 can be positioned on the flat layer and positioned in the peripheral area of the light-emitting structure 2; the specific arrangement of the planarization layer and the pixel definition layer is similar to the prior art and will not be described herein.
In one embodiment, the blocking structure 12 is located on a planar layer; alternatively, in another embodiment, the blocking structure 12 is located on the pixel defining layer 3; in a further embodiment, part of the blocking structure 12 is located on the planar layer and the remaining part of the blocking structure 12 is located on the pixel defining layer 3. This arrangement of the blocking structure 12 is more flexible and more conducive to the fabrication of practical production processes.
Fig. 8 is a simple top view showing a positional relationship between the light emitting structure 2 of the display panel and the plurality of openings 13, and fig. 9 and 10 are cross-sectional views cut along lines F-F and G-G of fig. 8, respectively. In order to be able to enhance the elasticity of the stretchable display panel, as shown in fig. 8 to 10, a plurality of openings 13 may be provided around the light emitting structure 2. Specifically, in the embodiment of the present application, at least a portion of the periphery of the light emitting structure 2 is provided with an opening 13, and the opening 13 may penetrate through the flat layer or the flexible substrate; of course, in actual design, the openings 13 may be disposed on the periphery of all the light emitting structures 2, and the blocking structure 12 in the embodiment of the present application is disposed around the openings 13.
In the embodiment of the present application, the shape of the opening 13 may be a rectangle, wherein the rectangular opening 13 has a length of 50 to 1000 micrometers and a width of 20 to 200 micrometers. The blocking structure 12 may be disposed around the opening 13 based on the design point of the embodiment of the present application.
As shown in fig. 11-13, the barrier structure 12 is disposed between the light emitting structure 2 and the opening 13, and the length of the moisture erosion path a from the opening 13 is increased due to the barrier structure 12, so that the overall packaging performance of the display panel is further enhanced.
As shown in fig. 11-13, according to the actual use requirement, a cathode blocking area c and a cathode non-blocking area d can be formed in the display panel by using the blocking structure 12, wherein the cathode blocking area c includes two blocking structures 12, so that a plurality of blocking structures 12 can be disposed in different positions of the important packaging area, and the flexibility of packaging is increased without increasing the packaging cost and the process difficulty.
In addition, the barrier structure 12 of the embodiment of the present application can not only disconnect and increase the moisture erosion path, but also limit the organic material coating range in the first organic layer 10 in the region of the light emitting layer of the light emitting structure 2. Fig. 14 and 15 respectively show a top view of the display panel of fig. 8 coated with an organic layer and a cross-sectional view of the display panel in which the organic layer is confined based on the blocking structure of the embodiment of the present application.
As shown in fig. 14 and 15, since the blocking structure 12 is disposed between the light emitting structure 2 and the encapsulation layer, and the blocking structure 12 itself has a certain height, the coating range of the organic material in the encapsulation layer is limited, so that the organic material is only coated on the inorganic thin film electroluminescent layer of the light emitting structure, thereby providing the limitation of the organic material pattern, and reducing the process difficulty and the manufacturing cost for manufacturing the flexible display. In addition, in the embodiment of the present application, the size e of the island region of the organic material coating patterned light emitting layer of the first organic layer 10 is 100 to 1000 micrometers, and the width f of the connection bridge between two adjacent holes is 20 to 500 micrometers
The display panel provided by the embodiment of the application further comprises an encapsulation layer, which is positioned on the cathode layer 4 and covers the substrate 1.
In a second aspect, the present invention also discloses a display device comprising: the display panel in the first aspect. By the blocking structure 12 of the display panel in the first aspect, the overall packaging performance of the display device is increased, and the space required for packaging the light emitting structure is reduced.
In a third aspect, the present invention also discloses a method of manufacturing a display panel according to the first aspect, as shown in fig. 16, including:
s101: manufacturing a plurality of light-emitting structures arranged in an array on a substrate;
s102: manufacturing a blocking structure on the light-emitting structure, wherein the blocking structure is at least positioned in the peripheral area of the substrate;
s103: manufacturing a cathode layer on the blocking structure; wherein: the blocking structure causes the cathode layer to break at a location corresponding to the blocking structure.
In specific implementation, the specific manufacturing method of the light emitting structure of the present application is similar to that of the prior art, and is not described herein again.
The above S102: the blocking structure is manufactured on the light-emitting structure, and in specific implementation, the blocking structure can be manufactured through a composition process.
The above S103: the cathode layer is manufactured on the blocking structure, and in the specific implementation process, the specific manufacturing method of the cathode layer is similar to that of the prior art, and the difference is that the blocking structure is manufactured before the cathode layer is manufactured, so that the cathode layer is disconnected at the position corresponding to the blocking structure, the water and oxygen erosion path can be blocked, and the water and oxygen blocking performance of the display panel is improved.
The beneficial effects obtained by applying the embodiment of the invention comprise:
1. because the blocking structure is arranged in the display panel of the embodiment of the application, the blocking structure is at least positioned in the peripheral area of the substrate, the cathode layer can be disconnected at the position corresponding to the blocking structure, compared with the prior art, the blocking structure can block the damage path of water-oxygen erosion in the prior art, the water-oxygen blocking performance of the display panel is increased, the overall packaging performance of the display panel is improved under the condition that the elasticity of the display panel and the packaging space of each light-emitting structure are not damaged, the high-resolution pixel-level packaging structure can be realized, and the design requirement of a narrow frame can be met.
2. Since the orthographic projection area of the upper surface of the blocking structure on the substrate is larger than that of the lower surface of the blocking structure on the substrate in the embodiment of the application. When coating the cathode layer on light emitting structure and blocking layer, the cathode layer can't cover the bottom of blocking the structure completely for a part of base plate exposes outside at the bottom of blocking the structure, and when coating the encapsulation layer, the encapsulation layer can wrap up completely and block the structure, increases the effect of blocking water oxygen erosion route. In addition, the inorganic layer of the encapsulation layer has stronger adhesion force compared with the cathode layer, so that the firmness between the encapsulation layer and the substrate is enhanced.
3. The blocking structure can be arranged at the top and/or the periphery of the light-emitting structure, and can also be arranged at the opening or other corresponding positions, so that the length of a water-oxygen erosion path can be increased, and the overall packaging performance of the display panel is further enhanced.
4. Because the blocking structure is arranged between the light-emitting structure and the packaging layer and has a certain height, the coating range of the organic material in the packaging layer is limited, so that the organic material is only coated on the inorganic thin film electroluminescent layer of the light-emitting structure, the limitation of the organic material pattern cloth is provided, and the process difficulty and the manufacturing cost for manufacturing the flexible display are reduced.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A display panel, comprising:
a substrate;
a plurality of light emitting structures arranged in an array, the light emitting structures being disposed on the substrate;
a blocking structure located at least in a peripheral region of the substrate;
a cathode layer on the light emitting structure and the blocking structure;
the blocking structure enables the cathode layer to be disconnected at the position corresponding to the blocking structure;
a planarization layer and a pixel defining layer;
the flat layer is positioned between the substrate and the light-emitting structure; the pixel defining layer is positioned on the flat layer and is positioned in the peripheral area of the light emitting structure;
the blocking structure is positioned on the flat layer;
at least part of the periphery of the light-emitting structure is provided with an opening, and the opening penetrates through the flat layer;
the blocking structure is disposed around the aperture.
2. The display panel according to claim 1, wherein at least a part of a peripheral region of the light emitting structure is provided with the blocking structure.
3. The display panel according to claim 1 or 2, wherein an area of an orthographic projection of an upper surface of the blocking structure on the substrate is larger than an area of an orthographic projection of a lower surface of the blocking structure on the substrate.
4. The display panel according to claim 3, wherein the cross-sectional shape of the blocking structure is an inverted trapezoid;
the material of the blocking structure comprises photoresist.
5. The display panel of claim 3, wherein the cathode layer is in contact with sidewalls of the blocking structure;
or, a gap exists between the cathode layer and the sidewall of the blocking structure.
6. The display panel according to claim 1 or 2, characterized by further comprising: the blocking structure is located on the pixel defining layer.
7. The display panel of claim 1, further comprising an encapsulation layer on the cathode layer and covering the substrate.
8. A display device, comprising: the display panel of any one of claims 1-7.
9. A method for manufacturing a display panel according to any one of claims 1 to 7, comprising:
manufacturing a plurality of light-emitting structures arranged in an array on the substrate;
manufacturing a blocking structure on the light emitting structure, wherein the blocking structure is at least positioned in the peripheral area of the substrate;
manufacturing a cathode layer on the blocking structure; wherein: the blocking structure causes the cathode layer to break at a location corresponding to the blocking structure.
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| CN201810805652.0A CN108899352B (en) | 2018-07-20 | 2018-07-20 | Display panel, manufacturing method thereof and display device |
| US16/518,246 US10872941B2 (en) | 2018-07-20 | 2019-07-22 | Display panel, manufacture method thereof and display device |
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| CN111566834B (en) * | 2018-12-05 | 2023-11-07 | 京东方科技集团股份有限公司 | Stretchable display panel, stretchable display device, and method of manufacturing stretchable display panel |
| CN109935730B (en) * | 2019-03-28 | 2021-10-26 | 京东方科技集团股份有限公司 | Display substrate, preparation method thereof and display device |
| CN110120464B (en) | 2019-05-27 | 2022-01-28 | 京东方科技集团股份有限公司 | Display substrate, preparation method thereof and display device |
| CN110544714B (en) * | 2019-09-27 | 2021-10-01 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN111668241B (en) * | 2020-06-30 | 2023-07-18 | 京东方科技集团股份有限公司 | Organic light emitting display panel and display device |
| CN112164766B (en) * | 2020-09-24 | 2022-08-05 | 武汉华星光电半导体显示技术有限公司 | Method for manufacturing organic light emitting display substrate |
| CN112885977A (en) * | 2021-01-20 | 2021-06-01 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof and display panel |
| CN113437235B (en) * | 2021-06-22 | 2024-04-23 | 京东方科技集团股份有限公司 | Display substrate, preparation method and display device |
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| KR102456698B1 (en) | 2015-01-15 | 2022-10-19 | 삼성디스플레이 주식회사 | Stretchable display device |
| KR102396298B1 (en) | 2015-03-02 | 2022-05-11 | 삼성디스플레이 주식회사 | Flexible display apparatus |
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| KR101973163B1 (en) | 2016-03-22 | 2019-04-29 | 삼성디스플레이 주식회사 | Display device |
| KR102524535B1 (en) | 2016-03-29 | 2023-04-24 | 삼성디스플레이 주식회사 | Display device |
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| US20200027936A1 (en) | 2020-01-23 |
| US10872941B2 (en) | 2020-12-22 |
| CN108899352A (en) | 2018-11-27 |
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